Revert of Change WokerThread to use a blink::WebThread.

Source/core/inspector/WorkerRuntimeAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #include "config.h"
 
 #include "core/inspector/WorkerRuntimeAgent.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "core/inspector/InjectedScript.h"
 #include "core/inspector/InstrumentingAgents.h"
 #include "core/inspector/WorkerDebuggerAgent.h"
 #include "core/workers/WorkerGlobalScope.h"
+#include "core/workers/WorkerRunLoop.h"
 #include "core/workers/WorkerThread.h"
 
 namespace blink {
 
 WorkerRuntimeAgent::WorkerRuntimeAgent(InjectedScriptManager* injectedScriptManager, ScriptDebugServer* scriptDebugServer, WorkerGlobalScope* workerGlobalScope)
     : InspectorRuntimeAgent(injectedScriptManager, scriptDebugServer)
     , m_workerGlobalScope(workerGlobalScope)
     , m_paused(false)
 {
 }
@@ skipping 56 matching lines @@
     *out_result = m_paused;
 }
 
 void WorkerRuntimeAgent::willEvaluateWorkerScript(WorkerGlobalScope* context, int workerThreadStartMode)
 {
     if (workerThreadStartMode != PauseWorkerGlobalScopeOnStart)
         return;
 
     m_paused = true;
     MessageQueueWaitResult result;
-    context->thread()->willEnterNestedLoop();
     do {
-        result = context->thread()->runDebuggerTask();
+        result = context->thread()->runLoop().runDebuggerTask();
     // Keep waiting until execution is resumed.
     } while (result == MessageQueueMessageReceived && m_paused);
-    context->thread()->didLeaveNestedLoop();
 }
 
 } // namespace blink